Detections
Analytics

Cisco IOS Software Network-Based Application Recognition Denial of Service Vulnerabilities

high Nessus Plugin ID 134713

Language:

Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco IOS Software is affected by following multiple vulnerabilities

 - Multiple vulnerabilities in the Network-Based Application Recognition (NBAR) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload.These vulnerabilities are due to a parsing issue on DNS packets. An attacker could exploit these vulnerabilities by sending crafted DNS packets through routers that are running an affected version and have NBAR enabled. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a denial of service (DoS) condition.
 (CVE-2019-1738, CVE-2019-1739, CVE-2019-1740)

Please see the included Cisco BIDs and Cisco Security Advisory for more information

Solution

Upgrade to the relevant fixed version referenced in Cisco bug IDs CSCvb51688, CSCvc94856, CSCvc99155, CSCvf01501

See Also

http://www.nessus.org/u?7b838dda

http://tools.cisco.com/security/center/viewErp.x?alertId=ERP-71135

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvb51688

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc94856

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvc99155

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvf01501

Plugin Details

Severity: High

ID: 134713

File Name: cisco-sa-20190327-ios-nbar.nasl

Version: 1.8

Type: local

Family: CISCO

Published: 3/19/2020

Updated: 3/22/2022

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2019-1740

CVSS v3

Risk Factor: High

Base Score: 8.6

Temporal Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:cisco:ios_xe, cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS-XE/Version

Exploit Ease: No known exploits are available

Patch Publication Date: 3/27/2019

Vulnerability Publication Date: 3/27/2019

Reference Information

CVE: CVE-2019-1738, CVE-2019-1739, CVE-2019-1740

BID: 107597